Remove decorator for llvm.org/pr17233

This test was skipped as it used to segfault on FreeBSD.  It seems
the original issue has since been fixed, so have the test run again.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@201169 91177308-0d34-0410-b5e6-96231b3b80d8